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/*
** Copyright 1998-2003 University of Illinois Board of Trustees
** Copyright 1998-2003 Mark D. Roth
** All rights reserved.
**
** util.c - miscellaneous utility code for libtar
**
** Mark D. Roth <roth@uiuc.edu>
** Campus Information Technologies and Educational Services
** University of Illinois at Urbana-Champaign
*/
#include <libtarint/internal.h>
#include <stdio.h>
#include <libtar/compat.h>
#include <errno.h>
#ifdef STDC_HEADERS
# include <string.h>
#endif
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <direct.h>
#else
#include <sys/param.h>
#endif
/* hashing function for pathnames */
int
path_hashfunc(char *key, int numbuckets)
{
char buf[TAR_MAXPATHLEN];
char *p;
strcpy(buf, key);
p = basename(buf);
return (((unsigned int)p[0]) % numbuckets);
}
/* matching function for dev_t's */
int
dev_match(dev_t *dev1, dev_t *dev2)
{
return !memcmp(dev1, dev2, sizeof(dev_t));
}
/* matching function for ino_t's */
int
ino_match(ino_t *ino1, ino_t *ino2)
{
return !memcmp(ino1, ino2, sizeof(ino_t));
}
/* hashing function for dev_t's */
int
dev_hash(dev_t *dev)
{
return *dev % 16;
}
/* hashing function for ino_t's */
int
ino_hash(ino_t *inode)
{
return *inode % 256;
}
/*
** mkdirhier() - create all directories in a given path
** returns:
** 0 success
** 1 all directories already exist
** -1 (and sets errno) error
*/
int
mkdirhier(char *path)
{
char src[TAR_MAXPATHLEN], dst[TAR_MAXPATHLEN] = "";
char *dirp, *nextp = src;
int retval = 1;
if (strlcpy(src, path, sizeof(src)) > sizeof(src))
{
errno = ENAMETOOLONG;
return -1;
}
if (path[0] == '/')
strcpy(dst, "/");
while ((dirp = strsep(&nextp, "/")) != NULL)
{
if (*dirp == '\0')
continue;
/*
* Don't try to build current or parent dir. It doesn't make sense anyhow,
* but it also returns EINVAL instead of EEXIST on BeOS!
*/
if ((strcmp(dirp, ".") == 0) || (strcmp(dirp, "..") == 0))
continue;
if (dst[0] != '\0')
strcat(dst, "/");
strcat(dst, dirp);
#if defined(_WIN32)
/* On some Windows machine, trying to mkdir("C:") would fail miserably */
if (dst[strlen(dst) - 1] == ':')
continue;
#endif
if (
#if defined(_WIN32) && !defined(__CYGWIN__)
mkdir(dst) == -1
#else
mkdir(dst, 0777) == -1
#endif
)
{
#ifdef __BORLANDC__
/* There is a bug in the Borland Run time library which makes MKDIR
return EACCES when it should return EEXIST
if it is some other error besides directory exists
then return false */
if ( errno == EACCES)
{
errno = EEXIST;
}
#endif
if (errno != EEXIST)
return -1;
}
else
retval = 0;
}
return retval;
}
/* calculate header checksum */
int
th_crc_calc(TAR *t)
{
int i, sum = 0;
for (i = 0; i < T_BLOCKSIZE; i++)
sum += ((unsigned char *)(&(t->th_buf)))[i];
for (i = 0; i < 8; i++)
sum += (' ' - (unsigned char)t->th_buf.chksum[i]);
return sum;
}
/* string-octal to integer conversion */
int
oct_to_int(char *oct)
{
int i;
sscanf(oct, "%o", &i);
return i;
}
/* integer to string-octal conversion, no NULL */
void
int_to_oct_nonull(int num, char *oct, size_t octlen)
{
snprintf(oct, octlen, "%*lo", (int)(octlen-1), (unsigned long)num);
oct[octlen - 1] = ' ';
}
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